Gasket



FIG. 1 is a perspective view of a gasket showing my new design;

FIG. 2 is a front view thereof, which is a mirror image of a rear viewthereof (not shown);

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof; and,

FIG. 5 is a left side view thereof, which is a mirror image of a rightside view (not shown).

The ornamental design for a gasket, as shown and described.